Option for the use of 10 additional internal VoIP call numbers with a LANCOM router (additiv for up to 40 numbers), available for LANCOM 1906x, 1784x, 1783x, 1781x, and 1631E with LANCOM All-IP Option, LANCOM VoIP +10 Option,
(LANCOM Article no 61423 )

Upgrade for LANCOM VoIP router with 10 additional internal VoIP numbers (additionally up to 40) and 10 external SIP lines (additionally up to 55)